PHP implements multi machine interlock instances by inserting mysql data

This article describes the example of PHP through the insertion of mysql data to achieve multi-machine interlocking method, shared for your reference. The specific implementation method is as follows:

You can add 1 lock before executing the process. The shell shackle function is as follows. If it succeeds, it will return 0, otherwise it will return a non-0 value:

function get_lock()

{

    local dataId="${1}"

    local dataDate="${2}"
    local sql="insert intot_trans_lock

    (dataId, dataDate) values('${dataId}', '${dataDate}');"

    echo ${sql} | ${DB_PUBLIC}
    return $?

}

Release the lock when the execution fails or ends

function free_lock()

{

    local dataId="${1}"

    local dataDate="${2}"

    local status="${3}"
    local sql="delete from t_trans_lock 

    where dataId='${dataId}' and dataDate='${dataDate}';"

    echo ${sql} | ${DB_PUBLIC}

    if [ $? -ne 0 ]; then

        write_log ${dataId} "free lock failed"

    fi

    return ${status}

}

I hope this article is helpful to everyone's PHP + MySQL programming.